I had sex on the last day of my period and 8 days before ovulation . can i get pregnant ?

Less Likely: The last day of your period is a low-risk time for pregnancy. The problem is that the ovary isn't connected to the app that tells you when you are going to ovulate. Sometimes you ovulate early or late. Timing is not the best way to prevent pregnancy. If you don't want to get pregnant, use a reliable form of birth-control rather than timing. Best wishes!

Timing intercourse: It is very unlikely that you ovulated that early. Keep in mind that sperm can be viable a few days in the fallopian tube. Feel free to use ovulation kits for a few months to determine when you ovulate and then stop having unprotected intercourse 5 days before and 5 days after (to be very safe) or even better make an appt with your doc for a birth control method, if you wish to avoid pregnancy.